Hydroxyethyl Cellulose (HEC)yog ib qho polymer uas yaj tau hauv dej uas tsis yog ionic, uas tau hloov kho los ntawm cov cellulose ntuj. Nws muaj cov khoom zoo yaj hauv dej, ua kom tuab, khaws dej thiab tsim cov zaj duab xis. Hauv cov xim latex, hydroxyethyl cellulose yog ib qho khoom siv tseem ceeb thiab siv dav hauv cov txheej txheem sab hauv thiab sab nraud ntawm phab ntsa kom tuab, ruaj khov, tawg, ncua thiab txhim kho kev ua haujlwm.
1. Cov khoom tseem ceeb ntawm hydroxyethyl cellulose
Kev yaj dej zoo: HEC tuaj yeem yaj sai sai hauv dej txias thiab dej kub los tsim cov tshuaj colloidal pob tshab thiab sib xws.
Cov nyhuv thickening pom tseeb: Nws tuaj yeem ua rau kom cov xim latex viscosity thiab txhim kho nws txoj haujlwm thiab kev sib npaug.
Kev ruaj khov ntawm kev ncua: Nws tuaj yeem tiv thaiv kev tso cov xim thiab cov khoom sau thiab txhim kho kev ruaj khov ntawm cov xim latex.
Cov yam ntxwv zoo ntawm kev tsim cov zaj duab xis: Nws pab tsim cov zaj duab xis txheej tuab thiab txhim kho qhov puv thiab tiaj tus ntawm cov zaj duab xis xim.
Kev sib raug zoo muaj zog: Nws muaj kev sib raug zoo nrog ntau yam emulsions, pigments, fillers thiab lwm yam additives.
2. Lub luag haujlwm ntawm hydroxyethyl cellulose hauv cov xim pleev xim latex
Cov Khoom Siv Ua Kom Thickener: Tswj cov khoom rheological ntawm cov xim, tiv thaiv kom tsis txhob ntub thiab txaws, thiab txhim kho kev ua haujlwm ntawm kev txhuam thiab dov.
Tus neeg sawv cev khaws dej: Tiv thaiv kom tsis txhob poob dej hauv cov xim thaum lub sijhawm tsim kho thiab txhim kho qhov zoo ntawm cov zaj duab xis thaum lub sijhawm ziab.
Stabilizer: Txhim kho qhov kev sib kis thiab kev ruaj khov ntawm cov emulsion thiab cov xim filler hauv cov mis kom tiv thaiv kev stratification thiab agglomeration.
Txhim kho kev ua tau zoo ntawm kev tsim kho: Txhim kho kev nplua thiab kev du ntawm kev tsim kho kom ua rau kev txhuam du thiab ntuj dua.
3. Txoj kev siv
3.1. Txoj kev faib cov hmoov qhuav ncaj qha
Siv tau rau cov xwm txheej tsim khoom nrog cov khoom siv dispersion ceev ceev:
Ntxiv cov dej huv raws li tau teev tseg rau hauv lub thawv sib tov;
Pib ua kom nrawm nrawm thiab maj mam ntxiv HEC hmoov qhuav;
Txuas ntxiv do rau 15-30 feeb kom txog thaum HEC ntub tag thiab tawg ua tej daim me me;
Sawv rau 1-2 teev (lossis ntev dua) kom nws o tag nrho;
Do dua kom txog thaum nws yaj tag kom ua tau ib qho kua nplaum sib xws thiab pob tshab;
Ntxiv lwm yam emulsions, pigments, additives, thiab lwm yam los ua xim latex.
3.2. Txoj kev ua kua txiv hmab uas tau ua ntej lawm
Haum rau kev tsim khoom loj, yooj yim rau kev khiav lag luam thiab ntsuas:
Ua ntej ntub HEC nrog dej;
Maj mam ua kom sov mus rau 60-70 ℃ nyob rau hauv qhov qeeb qeeb qeeb kom txhawb nws cov yaj;
Los yog qhib cov txheej txheem yaj los ntawm kev ntxiv me ntsis alkali (xws li dej ammonia);
Tom qab yaj tag, cov dej cawv uas tau ua ntej gelatinized tau tsim, uas tuaj yeem ntxiv rau cov xim latex raws li qhov xav tau.
4. Cov lus qhia txog kev siv tshuaj
Tus nqi ntawm hydroxyethyl cellulose ntxiv rau cov xim latex feem ntau yog 0.2% ~ 1.0% (raws li qhov zoo ntawm cov khoom tiav), uas tau kho raws li qhov xav tau viscosity thiab kev ua haujlwm ntawm kev tsim kho.
Qhov viscosity (feem ntau yog raws li 2% aqueous kua) muaj ntau yam kev xaiv, xws li kaum tawm ntawm mPa·s mus rau pua pua txhiab tus mPa·s. Cov uas siv ntau yog:
30,000~60,000 mPa·s: rau cov xim latex uas muaj viscosity nruab nrab thiab siab;
100,000~200,000 mPa·s: rau cov xim tuab lossis cov xim nplaum.
5. Kev ceev faj
Qhov kev txiav txim ntawm kev sib kis yog qhov tseem ceeb: cov hmoov qhuav yuav tsum tau sib kis kom sib npaug zos kom tsis txhob muaj kev sib sau ua ke thiab nyuaj rau kev yaj.
Tiv thaiv kom tsis txhob caking: Thaum ntxiv HEC, yuav tsum tau ua kom ceev nrooj kom tiv thaiv cov hmoov agglomeration los ntawm kev cuam tshuam rau kev yaj.
Kev ruaj khov ntawm kev khaws cia: HEC kua yuav tsum khaws cia rau hauv chav tsev kub kom tsis txhob raug rau lub sijhawm ntev rau qhov kub thiab txias lossis muaj zog acid thiab alkali ib puag ncig.
Kev xeem sib xws: Qhov sib xws ntawm HEC nrog cov emulsions thiab cov khoom ntxiv los ntawm ntau lub tuam txhab tsim khoom yuav txawv, thiab cov mis yuav tsum tau txiav txim siab tom qab kev xeem.
Ua ib qho thickener uas ua tau zoo, pheej yig thiab ib puag ncig zoo rau dej, daim ntawv thov ntawmhydroxyethyl cellulose hauv cov xim latexmuab cov khoom nrog kev tswj hwm rheological zoo thiab kev paub txog kev tsim kho. Los ntawm kev xaiv qib viscosity, tswj cov txheej txheem ntxiv thiab cov mis sib piv, kev ua tau zoo ntawm cov xim latex tuaj yeem txhim kho tau zoo heev. Nrog rau kev nrhiav kev tiv thaiv ib puag ncig thiab kev ua tau zoo hauv kev lag luam txheej txheem vaj tse, tus nqi ntawm daim ntawv thov ntawm HEC yuav raug hais ntxiv.
Lub sijhawm tshaj tawm: Tsib Hlis-31-2025